Nailing-machine.



G. W. JACKSON.

NAILING MACHINE. APPLICATION FILED AUG. 4, 1909.

6 SHEETS-SHEET 1.

Q 3 I N 606749565 Patented Jan.3,1911.

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0. W1 JACKSON.

NAILING MACHINE.

APPLICATION FILED AUG. 4, 1909 Patented Jan 3, 1911.

5 BEEETEPBHEET 2.

' o. W. JACKSON.

NAILING MACHINE.

APPLICATION run) we. 4, 190a.

Patented Jan. 3, 1911.

G. W. JACKSON.

NAILING MACHINE.

APPLICATION nun 11111.4, 1909.

980,281. Patented Jan. 3, 1911.

6 SHEETS-SHEET 4.

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NAILING MACHINE.

APPLICATION FILED AUG. 4, 1909.

980,281. Patented Jan. 3, 1911.

UNITED STATES PATENT OFFICE.

CLARENCE W. JACKSON, OF WESTHOPE, NORTH DAKOTA, ASSIGNOR OF ONE-HALF TO JAMES P. FLYNN, OF WES'IHOPE, NORTH DAKOTA.

NAILING-MACHIN E.

Specification of Letters Patent.

Patented Jan. 3, 1911.

To all whom it may concern:

Be it known that I, CLARENCE W. J ACK- SON, a citizen of the United States, residing at Westhope, county of Bottineau, and State of North Dakota, have invented certain new and useful Improvements in Nailing-Machines, of which the following is a specification.

My invention relates to nailing machines.

The present invention relates to that class of devices adapted for use in nailing opera tions to automatically supply the nails, in succession, to a given point from which they are driven by striking a hammer upon the driving part of the mechanism and has for its object the provision of a novel hopper for containing the nails and provided with novel means for feeding the nails to the nail race; novel means for actuating the hopper in a step-by-step manner to effect the feeding of the nails therefrom to the nail race; a novel nail race; novel means for effecting the feed of the nails from the nail race to the nail holder; a nail holder of novel construction;.and a novel driving and actuating device, the actuation of which by the blows of the hammer causes operation of the machine.

The invention embraces certain novel features and combinations of parts and mechanisms set forth fully hereinafter.

In the accompanying drawings: Figure 1 is a side elevation of the nailing machine when in position for use; Fig. 2, a plan view thereof; Fig. 3, a plan View of the hopper; Fig. 4, a bottom view of the hopper; Fig. 5, a lon itudinal section of the hopper; Fig. 6, a detail view of a part of the hopper, showing the exits of the nail holding slots; Fig. 7, a detail of the ratchet teeth and locking points of the hopper; Fig. 8, an end view looking toward the ends of the nail holding slots of the hopper; Fig. 9, a detail front elevation of the driver and nail holding devices; Fig. 10, a rear elevation thereof; Fig. 11, a sectional view on line 9-9 of Fig. 9; Fig. 12, a sectional View on line 1212 of Fig. 11; and Fig. 13, a detail view showing the slotted shoe and cut-off.

The frame comprises a hopper support 1, a circular nail retainer 2 having an outlet 3, a handle 4, and braces 5 and 6 connected to the nailing head 7 which has an outlet 8 in its lower end flanked by leaf springs 9 and a face leaf spring 10, the two former releasably gripping the nail shank and sustaining the nail by its head until it is driven, and the latter constituting a yielding wall which will give if the nails become clogged in the head. The rear face of the head has a vertical opening 11, through which the nails pass from the nail race, as will appear presently, and drop vertically into the head 7. The frame at the rear of the head is provided with a guard 12 to prevent the escape of the nails from the nail race and there is attached to the frame an overhanging cut-off 13 which closes the end of the nail race after a nail has been delivered to the head and thus permits but one nail to escape into the head at a time. A guard 14 on the frame prevents the nails from escaping upwardly when being delivered into the opening 11.

Rising from the frame is a guide 15 having a laterally extending slot 16. In the guide there is located a driver 17 Whose lower end 18 is adapted to reciprocate in the head 7 and to strike upon the head of the nail and drive it home when the machine is in use. The driver is provided with a suitable driving head 19 to receive the blows of the hammer or other tool used in operating the machine and said driver is held in normal raised position by springs 20 and 21 which surround rods 22 and 23 projecting respectively from the head 7 and the driving head 19. In the inner face of the driver there is provided a cam slot 24' composed of two parts disposed at an angle to each other.

Pivoted upon the hopper su port 1 is the hopper 25 which has a hinged cover 26 to afford convenient access thereto, said hopper being held in suitable position on its support by a coil spring 27 adjustably held by nuts 28. The hopper bottom is composed of alternating radial slots 29 and radial ridges 30, the ridges 30 serving to direct the nails into the slots so that the nails will be disposed in vertical rows and retained by their heads, but inasmuch as the machine is held in such position when in use that the hopper is inclined at an angle of about 45, the rows of nails which are disposed nearest the nailing mechanism tend to gravitate toward that side of the hopper, the lower edge 31 of the hopper being separated from the bottom thereof so that the heads of the nails can pass outwardly beyond the hopper in the extensions 29 of the slots 29, being retained against vertical movement by the guards 32, but prevented from passing laterally on account of their abutment against the circular nail retainer 2 except when a given row of nails is opposite the outlet 3. When in this position, the nails in that row can readily pass into the nail race, as will presently appear.

Projecting outwardly from the hopper, at regular intervals, are the locking points 33 and below these are the ratchet teeth 34;

The nail race 35 is pivoted on a pin 36 carried by the main frame and has an arm 37 which is adapted to play in the slot 16 and projects into the cam slot 24, being preferably provided with anti-friction rollers 38 and 39. In consequence of this arrangement, the shifting of the nail race and operation of the hopper is brought about by the movement of the driver.

The nail race consists of parallel members 40 and 41 connected by suitable clamps 42 and surmounted by a guard 43 which prevents the heads of the nails from rising. The end of the race is located adjacent the outlet 3 when in normal position, but when a blow is struck on the driver, a guard 44 carried thereby closes the outlet 3 and prevents further feed of the nails from the hopper. The nail race at its other end terminates in a slotted shoe 45 which is adapted to snugly yet easily play against the guard 12, but the inner member of said race at said end is provided with a shoe 46 which is adapted to play snugly yet easily against the cut-off 13. When the nail race is in position to deliver a nail to the opening 11, the slot in the shoe 45 receives the edge of the cut-off 13, which serves as a stop for the balance of the nails in the nail race.

Secured to the nail race are the arms 47 and 48 which respectively carry spring-ac tuated pawls 49 and 50 adapted to alter nately engage with the ratchet teeth 34, whereby the hopper is given a step-by-step rotation, two actuations of the driver being necessary to rotate the hopepr the full distance between adjacent nail holding slots. The arm 48 carries a stop 51 adapted to engage with the locking points 33 on the hopper to prevent the accidental rotation thereof.

Then in use, the machine is held in the position shown in Fig. 1, the workman grasping the handle 4 with one hand to position the nailing head at the point where it is desired to drive the nail and with the other hand imparting blows from a hammer on the striking head of the driver.

Assuming that the nail race is filled with nails and that the machine is positioned to drive a nail, upon striking the head of the driver, it is forced down against the retract ing action of its springs 20 and 21, the cam slot 24 causing the arm 37 to be moved laterally, thereby causing the lower feeding end thereof to be similarly moved and the lowermost nail to be passed under the overhanging edge of the cutoff l3 and then to pass into the vertical opening 11 and to drop down within the head 7 back of the lower end 18 of the driver so that when the blow on the previously positioned nail has been delivered and the driver is forced upwardly, the nail which is positioned, is in line to be struck when the driver is operated the next time and to be forced between the leaf springs 9 which guide the shank of the nail as it is being driven. These springs retain the nail in position in the head 7 until it is driven by the driver. lVhen the driver has been driven downward by a blow, and the nail race has been shifted as before described, the guard 44 closes the outlet 3 and prevents further feed of the nails from the hopper and thus obviates any choking at that point and at the same time the pawl 49 engages one of the ratchet teeth 34 and turns the hopper and the other pawl 50 drags idly into position so that on the return movement of the driver it will engage one of said ratchet teeth and give another partial turn to the hopper, and the pawl 49 will then drag idly into position so that it may subsequently engage. another ratchet tooth and so on. The stop 51 is adapted to engage one of the points 33 on each complete operation and thus insure a proper step-by-step rotation of the hopper and looking thereof.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent, is

1. In a nailing machine, the combination with driving mechanism, of a movable nail race operable by said driving mechanism .having means for delivering nails thereto and provided with a slotted shoe on one member thereof, a guard adjacent which the delivery part of the nail race is positioned and across which the slotted shoe sweeps, said guard normally preventing delivery of a nail but permitting escape thereof when the nail race is moved on the operation of the driving mechanism, and a cut-off plate overhanging the guard aforesaid in position so that the slot of the slotted shoe will receive it when the nail race is moved for the delivery of a nail to the nailing mechanism and which is arranged so that the end of the other member of the nail race is adapted to sweep therea-cross, said cut-off plate being adapted to close the mouth of the nail race and check the discharge of the nails on the actuation of the driving mechanism.

2. In a nailing machine, the combination with driving mechanism, of a movable nail race operable by said driving mechanism and adapted to deliver the nails thereto, a rotary hopper operated by the driving mechanism, having means for holding independent trains of nails and adapted for succesluv sively delivering them to the nail race, and a cut-off on the nail race adapted to block out at intervals the feed of nails from the trains thereto.

3. In a nailing machine, the combination With driving mechanism, of a movable nail race operable by said driving mechanism and adapted to deliver the nails thereto, a rotary hopper operated by the driving mechanism having means for successively delivering nails to the nail race, and means for cutting ofi' the supply of nails from the hopper to the nail race during the operative stroke of the driver.

4. In a nailing machine, the combination With driving mechanism, of a movable nail race adapted to deliver the nails to said driving mechanism, a rotatable hopper having a plurality of devices for successively delivering the nails to the nail race aforesaid and provided with ratchet teeth, and means for rotating said hopper step by step comprising an arm operated by the driving mechanism, and independent pawls carried by said arm adapted to alternately engage the ratchet teeth aforesaid.

5. In a nailing machine, the combination with driving mechanism, of a movable nail race adapted to deliver the nails to said driving mechanism, a rotatable hopper having a plurality of devices for successively delivering the nails to the nail race aforesaid and provided with ratchet teeth, means for rotating said hopper step by step comprising an arm operated by the driving mechanism, pawls carried thereby adapted to alternately engage the ratchet teeth aforesaid, and means operated by the arm adapted to cooperatively engage the hopper and lock it in its different positions.

In testimony whereof, I hereunto aflix my signature in presence of two witnesses.

CLARENCE WV. JACKSON.

Witnesses:

H. O. Fommsran, R. H. R0011. 

